Fender SR-8520PD User Manual

Page 12

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background image

FIGURE 2

*Example- The length of speaker wire
required is between 25 and 50 feet
and the speaker impedance is 8
ohms. The minimum recommended
gauge speaker wire is 16 gauge.

100'-UP

8

10 12 14

50'-100'

10 12 14 16

*25'-50'

12 14 *16 18

10'-25'

14 16 18 18

0'-10'

16 18 18 18

2

4

*8

16

Speaker Impedance

Speaker Wire Length

FIGURE 3

1.8 3.2 5.3

8

1.6 2.7

4

5.3

1.3

2 2.7* 3.2

1

1.3 1.6 1.8

Cabinet A Impedance

Cabinet B Impedance

16

8

4

*

2

2

4

8

* 16

CHART A

Parallel

Impedance

*Example- Cabinet A is 8 ohms.
Cabinet B is 4 ohms. The total
impedance when connected in
parallel is = 1 = 2.7 ohms

1
8

1
4

+

2

n

1

1
1

Z

1

Z

1

Z

...

+

Zp=

18 20* 24 32

10 12 16 24

6

8

12 20

4

6

10 18

Cabinet A Impedance

Cabinet B Impedance

16

*

8

4

2

2

4

* 8

16

CHART B

Series

Impedance

*Example- Cabinet A is 4
ohms. Cabinet B is 16 ohms.
The total impedance when
connected in series is 4 + 16
= 20 ohms.

2

n

1 Z

Z

Z

...

+

Zs=

FIGURE 4

PIN 1

PIN 2
PIN 3

PIN 1

PIN 2
PIN 3

SWITCHCRAFT

S3FM

22K

30dB PAD

22K

150

OHM

680

OHM

FEMALE

(to microphone)

MALE

(to mixer)

ALL RESITORS ARE 5%

1/4 WATT

+

-

+

-

+ -

+

-

+

-

+ -

A

B

B

A

Speaker Wire Gage

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